Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * toshiba_acpi.c - Toshiba Laptop ACPI Extras | |
3 | * | |
4 | * | |
5 | * Copyright (C) 2002-2004 John Belmonte | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | * | |
22 | * The devolpment page for this driver is located at | |
23 | * http://memebeam.org/toys/ToshibaAcpiDriver. | |
24 | * | |
25 | * Credits: | |
26 | * Jonathan A. Buzzard - Toshiba HCI info, and critical tips on reverse | |
27 | * engineering the Windows drivers | |
28 | * Yasushi Nagato - changes for linux kernel 2.4 -> 2.5 | |
29 | * Rob Miller - TV out and hotkeys help | |
30 | * | |
31 | * | |
32 | * TODO | |
33 | * | |
34 | */ | |
35 | ||
36 | #define TOSHIBA_ACPI_VERSION "0.18" | |
37 | #define PROC_INTERFACE_VERSION 1 | |
38 | ||
39 | #include <linux/kernel.h> | |
40 | #include <linux/module.h> | |
41 | #include <linux/init.h> | |
42 | #include <linux/types.h> | |
43 | #include <linux/proc_fs.h> | |
c9263557 HM |
44 | #include <linux/backlight.h> |
45 | ||
1da177e4 LT |
46 | #include <asm/uaccess.h> |
47 | ||
48 | #include <acpi/acpi_drivers.h> | |
49 | ||
50 | MODULE_AUTHOR("John Belmonte"); | |
51 | MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver"); | |
52 | MODULE_LICENSE("GPL"); | |
53 | ||
54 | #define MY_LOGPREFIX "toshiba_acpi: " | |
55 | #define MY_ERR KERN_ERR MY_LOGPREFIX | |
56 | #define MY_NOTICE KERN_NOTICE MY_LOGPREFIX | |
57 | #define MY_INFO KERN_INFO MY_LOGPREFIX | |
58 | ||
59 | /* Toshiba ACPI method paths */ | |
60 | #define METHOD_LCD_BRIGHTNESS "\\_SB_.PCI0.VGA_.LCD_._BCM" | |
61 | #define METHOD_HCI_1 "\\_SB_.VALD.GHCI" | |
62 | #define METHOD_HCI_2 "\\_SB_.VALZ.GHCI" | |
63 | #define METHOD_VIDEO_OUT "\\_SB_.VALX.DSSX" | |
64 | ||
65 | /* Toshiba HCI interface definitions | |
66 | * | |
67 | * HCI is Toshiba's "Hardware Control Interface" which is supposed to | |
68 | * be uniform across all their models. Ideally we would just call | |
69 | * dedicated ACPI methods instead of using this primitive interface. | |
70 | * However the ACPI methods seem to be incomplete in some areas (for | |
71 | * example they allow setting, but not reading, the LCD brightness value), | |
72 | * so this is still useful. | |
73 | */ | |
74 | ||
75 | #define HCI_WORDS 6 | |
76 | ||
77 | /* operations */ | |
78 | #define HCI_SET 0xff00 | |
79 | #define HCI_GET 0xfe00 | |
80 | ||
81 | /* return codes */ | |
82 | #define HCI_SUCCESS 0x0000 | |
83 | #define HCI_FAILURE 0x1000 | |
84 | #define HCI_NOT_SUPPORTED 0x8000 | |
85 | #define HCI_EMPTY 0x8c00 | |
86 | ||
87 | /* registers */ | |
88 | #define HCI_FAN 0x0004 | |
89 | #define HCI_SYSTEM_EVENT 0x0016 | |
90 | #define HCI_VIDEO_OUT 0x001c | |
91 | #define HCI_HOTKEY_EVENT 0x001e | |
92 | #define HCI_LCD_BRIGHTNESS 0x002a | |
93 | ||
94 | /* field definitions */ | |
95 | #define HCI_LCD_BRIGHTNESS_BITS 3 | |
96 | #define HCI_LCD_BRIGHTNESS_SHIFT (16-HCI_LCD_BRIGHTNESS_BITS) | |
97 | #define HCI_LCD_BRIGHTNESS_LEVELS (1 << HCI_LCD_BRIGHTNESS_BITS) | |
98 | #define HCI_VIDEO_OUT_LCD 0x1 | |
99 | #define HCI_VIDEO_OUT_CRT 0x2 | |
100 | #define HCI_VIDEO_OUT_TV 0x4 | |
101 | ||
102 | /* utility | |
103 | */ | |
104 | ||
4be44fcd | 105 | static __inline__ void _set_bit(u32 * word, u32 mask, int value) |
1da177e4 LT |
106 | { |
107 | *word = (*word & ~mask) | (mask * value); | |
108 | } | |
109 | ||
110 | /* acpi interface wrappers | |
111 | */ | |
112 | ||
4be44fcd | 113 | static int is_valid_acpi_path(const char *methodName) |
1da177e4 LT |
114 | { |
115 | acpi_handle handle; | |
116 | acpi_status status; | |
117 | ||
4be44fcd | 118 | status = acpi_get_handle(NULL, (char *)methodName, &handle); |
1da177e4 LT |
119 | return !ACPI_FAILURE(status); |
120 | } | |
121 | ||
4be44fcd | 122 | static int write_acpi_int(const char *methodName, int val) |
1da177e4 LT |
123 | { |
124 | struct acpi_object_list params; | |
125 | union acpi_object in_objs[1]; | |
126 | acpi_status status; | |
127 | ||
4be44fcd | 128 | params.count = sizeof(in_objs) / sizeof(in_objs[0]); |
1da177e4 LT |
129 | params.pointer = in_objs; |
130 | in_objs[0].type = ACPI_TYPE_INTEGER; | |
131 | in_objs[0].integer.value = val; | |
132 | ||
4be44fcd | 133 | status = acpi_evaluate_object(NULL, (char *)methodName, ¶ms, NULL); |
1da177e4 LT |
134 | return (status == AE_OK); |
135 | } | |
136 | ||
137 | #if 0 | |
4be44fcd | 138 | static int read_acpi_int(const char *methodName, int *pVal) |
1da177e4 LT |
139 | { |
140 | struct acpi_buffer results; | |
141 | union acpi_object out_objs[1]; | |
142 | acpi_status status; | |
143 | ||
144 | results.length = sizeof(out_objs); | |
145 | results.pointer = out_objs; | |
146 | ||
4be44fcd | 147 | status = acpi_evaluate_object(0, (char *)methodName, 0, &results); |
1da177e4 LT |
148 | *pVal = out_objs[0].integer.value; |
149 | ||
150 | return (status == AE_OK) && (out_objs[0].type == ACPI_TYPE_INTEGER); | |
151 | } | |
152 | #endif | |
153 | ||
4be44fcd | 154 | static const char *method_hci /*= 0*/ ; |
1da177e4 LT |
155 | |
156 | /* Perform a raw HCI call. Here we don't care about input or output buffer | |
157 | * format. | |
158 | */ | |
4be44fcd | 159 | static acpi_status hci_raw(const u32 in[HCI_WORDS], u32 out[HCI_WORDS]) |
1da177e4 LT |
160 | { |
161 | struct acpi_object_list params; | |
162 | union acpi_object in_objs[HCI_WORDS]; | |
163 | struct acpi_buffer results; | |
4be44fcd | 164 | union acpi_object out_objs[HCI_WORDS + 1]; |
1da177e4 LT |
165 | acpi_status status; |
166 | int i; | |
167 | ||
168 | params.count = HCI_WORDS; | |
169 | params.pointer = in_objs; | |
170 | for (i = 0; i < HCI_WORDS; ++i) { | |
171 | in_objs[i].type = ACPI_TYPE_INTEGER; | |
172 | in_objs[i].integer.value = in[i]; | |
173 | } | |
174 | ||
175 | results.length = sizeof(out_objs); | |
176 | results.pointer = out_objs; | |
177 | ||
4be44fcd LB |
178 | status = acpi_evaluate_object(NULL, (char *)method_hci, ¶ms, |
179 | &results); | |
1da177e4 LT |
180 | if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) { |
181 | for (i = 0; i < out_objs->package.count; ++i) { | |
182 | out[i] = out_objs->package.elements[i].integer.value; | |
183 | } | |
184 | } | |
185 | ||
186 | return status; | |
187 | } | |
188 | ||
189 | /* common hci tasks (get or set one value) | |
190 | * | |
191 | * In addition to the ACPI status, the HCI system returns a result which | |
192 | * may be useful (such as "not supported"). | |
193 | */ | |
194 | ||
4be44fcd | 195 | static acpi_status hci_write1(u32 reg, u32 in1, u32 * result) |
1da177e4 LT |
196 | { |
197 | u32 in[HCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 }; | |
198 | u32 out[HCI_WORDS]; | |
199 | acpi_status status = hci_raw(in, out); | |
200 | *result = (status == AE_OK) ? out[0] : HCI_FAILURE; | |
201 | return status; | |
202 | } | |
203 | ||
4be44fcd | 204 | static acpi_status hci_read1(u32 reg, u32 * out1, u32 * result) |
1da177e4 LT |
205 | { |
206 | u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 }; | |
207 | u32 out[HCI_WORDS]; | |
208 | acpi_status status = hci_raw(in, out); | |
209 | *out1 = out[2]; | |
210 | *result = (status == AE_OK) ? out[0] : HCI_FAILURE; | |
211 | return status; | |
212 | } | |
213 | ||
4be44fcd | 214 | static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ; |
c9263557 | 215 | static struct backlight_device *toshiba_backlight_device; |
4be44fcd LB |
216 | static int force_fan; |
217 | static int last_key_event; | |
218 | static int key_event_valid; | |
1da177e4 | 219 | |
4be44fcd LB |
220 | typedef struct _ProcItem { |
221 | const char *name; | |
222 | char *(*read_func) (char *); | |
223 | unsigned long (*write_func) (const char *, unsigned long); | |
1da177e4 LT |
224 | } ProcItem; |
225 | ||
226 | /* proc file handlers | |
227 | */ | |
228 | ||
229 | static int | |
4be44fcd LB |
230 | dispatch_read(char *page, char **start, off_t off, int count, int *eof, |
231 | ProcItem * item) | |
1da177e4 | 232 | { |
4be44fcd | 233 | char *p = page; |
1da177e4 LT |
234 | int len; |
235 | ||
236 | if (off == 0) | |
237 | p = item->read_func(p); | |
238 | ||
239 | /* ISSUE: I don't understand this code */ | |
240 | len = (p - page); | |
4be44fcd LB |
241 | if (len <= off + count) |
242 | *eof = 1; | |
1da177e4 LT |
243 | *start = page + off; |
244 | len -= off; | |
4be44fcd LB |
245 | if (len > count) |
246 | len = count; | |
247 | if (len < 0) | |
248 | len = 0; | |
1da177e4 LT |
249 | return len; |
250 | } | |
251 | ||
252 | static int | |
4be44fcd LB |
253 | dispatch_write(struct file *file, const char __user * buffer, |
254 | unsigned long count, ProcItem * item) | |
1da177e4 LT |
255 | { |
256 | int result; | |
4be44fcd | 257 | char *tmp_buffer; |
1da177e4 LT |
258 | |
259 | /* Arg buffer points to userspace memory, which can't be accessed | |
260 | * directly. Since we're making a copy, zero-terminate the | |
261 | * destination so that sscanf can be used on it safely. | |
262 | */ | |
263 | tmp_buffer = kmalloc(count + 1, GFP_KERNEL); | |
4be44fcd | 264 | if (!tmp_buffer) |
f4224153 PI |
265 | return -ENOMEM; |
266 | ||
1da177e4 LT |
267 | if (copy_from_user(tmp_buffer, buffer, count)) { |
268 | result = -EFAULT; | |
4be44fcd | 269 | } else { |
1da177e4 LT |
270 | tmp_buffer[count] = 0; |
271 | result = item->write_func(tmp_buffer, count); | |
272 | } | |
273 | kfree(tmp_buffer); | |
274 | return result; | |
275 | } | |
276 | ||
c9263557 | 277 | static int get_lcd(struct backlight_device *bd) |
1da177e4 LT |
278 | { |
279 | u32 hci_result; | |
280 | u32 value; | |
281 | ||
282 | hci_read1(HCI_LCD_BRIGHTNESS, &value, &hci_result); | |
283 | if (hci_result == HCI_SUCCESS) { | |
c9263557 HM |
284 | return (value >> HCI_LCD_BRIGHTNESS_SHIFT); |
285 | } else | |
286 | return -EFAULT; | |
287 | } | |
288 | ||
289 | static char *read_lcd(char *p) | |
290 | { | |
291 | int value = get_lcd(NULL); | |
292 | ||
293 | if (value >= 0) { | |
1da177e4 LT |
294 | p += sprintf(p, "brightness: %d\n", value); |
295 | p += sprintf(p, "brightness_levels: %d\n", | |
4be44fcd | 296 | HCI_LCD_BRIGHTNESS_LEVELS); |
1da177e4 LT |
297 | } else { |
298 | printk(MY_ERR "Error reading LCD brightness\n"); | |
299 | } | |
300 | ||
301 | return p; | |
302 | } | |
303 | ||
c9263557 HM |
304 | static int set_lcd(int value) |
305 | { | |
306 | u32 hci_result; | |
307 | ||
308 | value = value << HCI_LCD_BRIGHTNESS_SHIFT; | |
309 | hci_write1(HCI_LCD_BRIGHTNESS, value, &hci_result); | |
310 | if (hci_result != HCI_SUCCESS) | |
311 | return -EFAULT; | |
312 | ||
313 | return 0; | |
314 | } | |
315 | ||
316 | static int set_lcd_status(struct backlight_device *bd) | |
317 | { | |
318 | return set_lcd(bd->props->brightness); | |
319 | } | |
320 | ||
4be44fcd | 321 | static unsigned long write_lcd(const char *buffer, unsigned long count) |
1da177e4 LT |
322 | { |
323 | int value; | |
c9263557 | 324 | int ret = count; |
1da177e4 LT |
325 | |
326 | if (sscanf(buffer, " brightness : %i", &value) == 1 && | |
c9263557 HM |
327 | value >= 0 && value < HCI_LCD_BRIGHTNESS_LEVELS) |
328 | ret = set_lcd(value); | |
329 | else | |
330 | ret = -EINVAL; | |
331 | return ret; | |
1da177e4 LT |
332 | } |
333 | ||
4be44fcd | 334 | static char *read_video(char *p) |
1da177e4 LT |
335 | { |
336 | u32 hci_result; | |
337 | u32 value; | |
338 | ||
339 | hci_read1(HCI_VIDEO_OUT, &value, &hci_result); | |
340 | if (hci_result == HCI_SUCCESS) { | |
341 | int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0; | |
342 | int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0; | |
4be44fcd | 343 | int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0; |
1da177e4 LT |
344 | p += sprintf(p, "lcd_out: %d\n", is_lcd); |
345 | p += sprintf(p, "crt_out: %d\n", is_crt); | |
346 | p += sprintf(p, "tv_out: %d\n", is_tv); | |
347 | } else { | |
348 | printk(MY_ERR "Error reading video out status\n"); | |
349 | } | |
350 | ||
351 | return p; | |
352 | } | |
353 | ||
4be44fcd | 354 | static unsigned long write_video(const char *buffer, unsigned long count) |
1da177e4 LT |
355 | { |
356 | int value; | |
357 | int remain = count; | |
358 | int lcd_out = -1; | |
359 | int crt_out = -1; | |
360 | int tv_out = -1; | |
361 | u32 hci_result; | |
362 | int video_out; | |
363 | ||
364 | /* scan expression. Multiple expressions may be delimited with ; | |
365 | * | |
366 | * NOTE: to keep scanning simple, invalid fields are ignored | |
367 | */ | |
368 | while (remain) { | |
369 | if (sscanf(buffer, " lcd_out : %i", &value) == 1) | |
370 | lcd_out = value & 1; | |
371 | else if (sscanf(buffer, " crt_out : %i", &value) == 1) | |
372 | crt_out = value & 1; | |
373 | else if (sscanf(buffer, " tv_out : %i", &value) == 1) | |
374 | tv_out = value & 1; | |
375 | /* advance to one character past the next ; */ | |
376 | do { | |
377 | ++buffer; | |
378 | --remain; | |
379 | } | |
4be44fcd | 380 | while (remain && *(buffer - 1) != ';'); |
1da177e4 LT |
381 | } |
382 | ||
383 | hci_read1(HCI_VIDEO_OUT, &video_out, &hci_result); | |
384 | if (hci_result == HCI_SUCCESS) { | |
385 | int new_video_out = video_out; | |
386 | if (lcd_out != -1) | |
387 | _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out); | |
388 | if (crt_out != -1) | |
389 | _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out); | |
390 | if (tv_out != -1) | |
391 | _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out); | |
392 | /* To avoid unnecessary video disruption, only write the new | |
393 | * video setting if something changed. */ | |
394 | if (new_video_out != video_out) | |
395 | write_acpi_int(METHOD_VIDEO_OUT, new_video_out); | |
396 | } else { | |
397 | return -EFAULT; | |
398 | } | |
399 | ||
400 | return count; | |
401 | } | |
402 | ||
4be44fcd | 403 | static char *read_fan(char *p) |
1da177e4 LT |
404 | { |
405 | u32 hci_result; | |
406 | u32 value; | |
407 | ||
408 | hci_read1(HCI_FAN, &value, &hci_result); | |
409 | if (hci_result == HCI_SUCCESS) { | |
410 | p += sprintf(p, "running: %d\n", (value > 0)); | |
411 | p += sprintf(p, "force_on: %d\n", force_fan); | |
412 | } else { | |
413 | printk(MY_ERR "Error reading fan status\n"); | |
414 | } | |
415 | ||
416 | return p; | |
417 | } | |
418 | ||
4be44fcd | 419 | static unsigned long write_fan(const char *buffer, unsigned long count) |
1da177e4 LT |
420 | { |
421 | int value; | |
422 | u32 hci_result; | |
423 | ||
424 | if (sscanf(buffer, " force_on : %i", &value) == 1 && | |
4be44fcd | 425 | value >= 0 && value <= 1) { |
1da177e4 LT |
426 | hci_write1(HCI_FAN, value, &hci_result); |
427 | if (hci_result != HCI_SUCCESS) | |
428 | return -EFAULT; | |
429 | else | |
430 | force_fan = value; | |
431 | } else { | |
432 | return -EINVAL; | |
433 | } | |
434 | ||
435 | return count; | |
436 | } | |
437 | ||
4be44fcd | 438 | static char *read_keys(char *p) |
1da177e4 LT |
439 | { |
440 | u32 hci_result; | |
441 | u32 value; | |
442 | ||
443 | if (!key_event_valid) { | |
444 | hci_read1(HCI_SYSTEM_EVENT, &value, &hci_result); | |
445 | if (hci_result == HCI_SUCCESS) { | |
446 | key_event_valid = 1; | |
447 | last_key_event = value; | |
448 | } else if (hci_result == HCI_EMPTY) { | |
449 | /* better luck next time */ | |
450 | } else if (hci_result == HCI_NOT_SUPPORTED) { | |
451 | /* This is a workaround for an unresolved issue on | |
452 | * some machines where system events sporadically | |
453 | * become disabled. */ | |
454 | hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result); | |
455 | printk(MY_NOTICE "Re-enabled hotkeys\n"); | |
456 | } else { | |
457 | printk(MY_ERR "Error reading hotkey status\n"); | |
458 | goto end; | |
459 | } | |
460 | } | |
461 | ||
462 | p += sprintf(p, "hotkey_ready: %d\n", key_event_valid); | |
463 | p += sprintf(p, "hotkey: 0x%04x\n", last_key_event); | |
464 | ||
4be44fcd | 465 | end: |
1da177e4 LT |
466 | return p; |
467 | } | |
468 | ||
4be44fcd | 469 | static unsigned long write_keys(const char *buffer, unsigned long count) |
1da177e4 LT |
470 | { |
471 | int value; | |
472 | ||
4be44fcd | 473 | if (sscanf(buffer, " hotkey_ready : %i", &value) == 1 && value == 0) { |
1da177e4 LT |
474 | key_event_valid = 0; |
475 | } else { | |
476 | return -EINVAL; | |
477 | } | |
478 | ||
479 | return count; | |
480 | } | |
481 | ||
4be44fcd | 482 | static char *read_version(char *p) |
1da177e4 LT |
483 | { |
484 | p += sprintf(p, "driver: %s\n", TOSHIBA_ACPI_VERSION); | |
485 | p += sprintf(p, "proc_interface: %d\n", | |
4be44fcd | 486 | PROC_INTERFACE_VERSION); |
1da177e4 LT |
487 | return p; |
488 | } | |
489 | ||
490 | /* proc and module init | |
491 | */ | |
492 | ||
493 | #define PROC_TOSHIBA "toshiba" | |
494 | ||
4be44fcd LB |
495 | static ProcItem proc_items[] = { |
496 | {"lcd", read_lcd, write_lcd}, | |
497 | {"video", read_video, write_video}, | |
498 | {"fan", read_fan, write_fan}, | |
499 | {"keys", read_keys, write_keys}, | |
500 | {"version", read_version, NULL}, | |
501 | {NULL} | |
1da177e4 LT |
502 | }; |
503 | ||
4be44fcd | 504 | static acpi_status __init add_device(void) |
1da177e4 | 505 | { |
4be44fcd LB |
506 | struct proc_dir_entry *proc; |
507 | ProcItem *item; | |
1da177e4 | 508 | |
4be44fcd | 509 | for (item = proc_items; item->name; ++item) { |
1da177e4 | 510 | proc = create_proc_read_entry(item->name, |
4be44fcd LB |
511 | S_IFREG | S_IRUGO | S_IWUSR, |
512 | toshiba_proc_dir, | |
513 | (read_proc_t *) dispatch_read, | |
514 | item); | |
1da177e4 LT |
515 | if (proc) |
516 | proc->owner = THIS_MODULE; | |
517 | if (proc && item->write_func) | |
4be44fcd | 518 | proc->write_proc = (write_proc_t *) dispatch_write; |
1da177e4 LT |
519 | } |
520 | ||
521 | return AE_OK; | |
522 | } | |
523 | ||
4be44fcd | 524 | static acpi_status __exit remove_device(void) |
1da177e4 | 525 | { |
4be44fcd | 526 | ProcItem *item; |
1da177e4 LT |
527 | |
528 | for (item = proc_items; item->name; ++item) | |
529 | remove_proc_entry(item->name, toshiba_proc_dir); | |
530 | return AE_OK; | |
531 | } | |
532 | ||
c9263557 HM |
533 | static struct backlight_properties toshiba_backlight_data = { |
534 | .owner = THIS_MODULE, | |
535 | .get_brightness = get_lcd, | |
536 | .update_status = set_lcd_status, | |
537 | .max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1, | |
538 | }; | |
539 | ||
540 | static void __exit toshiba_acpi_exit(void) | |
541 | { | |
542 | if (toshiba_backlight_device) | |
543 | backlight_device_unregister(toshiba_backlight_device); | |
544 | ||
545 | remove_device(); | |
546 | ||
547 | if (toshiba_proc_dir) | |
548 | remove_proc_entry(PROC_TOSHIBA, acpi_root_dir); | |
549 | ||
550 | return; | |
551 | } | |
552 | ||
4be44fcd | 553 | static int __init toshiba_acpi_init(void) |
1da177e4 LT |
554 | { |
555 | acpi_status status = AE_OK; | |
556 | u32 hci_result; | |
557 | ||
558 | if (acpi_disabled) | |
559 | return -ENODEV; | |
fb9802fa | 560 | |
4be44fcd | 561 | if (!acpi_specific_hotkey_enabled) { |
fb9802fa | 562 | printk(MY_INFO "Using generic hotkey driver\n"); |
4be44fcd | 563 | return -ENODEV; |
fb9802fa | 564 | } |
1da177e4 LT |
565 | /* simple device detection: look for HCI method */ |
566 | if (is_valid_acpi_path(METHOD_HCI_1)) | |
567 | method_hci = METHOD_HCI_1; | |
568 | else if (is_valid_acpi_path(METHOD_HCI_2)) | |
569 | method_hci = METHOD_HCI_2; | |
570 | else | |
571 | return -ENODEV; | |
572 | ||
573 | printk(MY_INFO "Toshiba Laptop ACPI Extras version %s\n", | |
4be44fcd | 574 | TOSHIBA_ACPI_VERSION); |
1da177e4 LT |
575 | printk(MY_INFO " HCI method: %s\n", method_hci); |
576 | ||
577 | force_fan = 0; | |
578 | key_event_valid = 0; | |
579 | ||
580 | /* enable event fifo */ | |
581 | hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result); | |
582 | ||
583 | toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir); | |
584 | if (!toshiba_proc_dir) { | |
585 | status = AE_ERROR; | |
586 | } else { | |
587 | toshiba_proc_dir->owner = THIS_MODULE; | |
588 | status = add_device(); | |
589 | if (ACPI_FAILURE(status)) | |
590 | remove_proc_entry(PROC_TOSHIBA, acpi_root_dir); | |
591 | } | |
592 | ||
c9263557 HM |
593 | toshiba_backlight_device = backlight_device_register("toshiba", NULL, |
594 | &toshiba_backlight_data); | |
595 | if (IS_ERR(toshiba_backlight_device)) { | |
596 | printk(KERN_ERR "Could not register toshiba backlight device\n"); | |
597 | toshiba_backlight_device = NULL; | |
598 | toshiba_acpi_exit(); | |
599 | } | |
1da177e4 | 600 | |
c9263557 | 601 | return (ACPI_SUCCESS(status)) ? 0 : -ENODEV; |
1da177e4 LT |
602 | } |
603 | ||
604 | module_init(toshiba_acpi_init); | |
605 | module_exit(toshiba_acpi_exit); |